Pull down shelf

I have a hymer tramp 554 cl with a pull down shelf for a kettle it seems to be counter balanced with a wire for ease of use .
The wire has become loose and the shelf is hard to use are there any funsters out there who have had this problem or have any idea how to fix.View attachment 56738

We had the same problem, but the van was repaired under warranty, but the wire fits over the pulley wheel in the cupboard next to the pull down, dealer claimed it came off pulley as we pulled it down to quickly, but even after the repair it does not work well.